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Blackened old painting can be restored i...

Blackened old painting can be restored into original form by the action of

A

chlorine

B

`BaO_(2)`

C

`H_(2)O_(2)`

D

`MnO_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
In refreshing old oil paintings which becomes black due to the formation of black `PbS, H_(2)O_(2)` converts it into white `PbSO_(4)`.
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Assertion (A) : The colour of old lead painting can be restored by washing with dilute solution of H_2O_2 . Reason (R) : Black lead sulphide is oxidised by H_2O_2 to white lead suphate.

Assertion:- The colour of old lead paintings can be retored by washing with dilute solution of H_(2)O_(2) Reason:- Black lead sulphide is oxidised by H_(2)O_(2) to white lead sulphate.

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-HYDROGEN -EXERCISE 2
  1. Blackened old painting can be restored into original form by the actio...

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  2. Nascent hydrogen is prepared by

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  3. The metal, which gives hydrogen on treatment with acid as well as sodi...

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  4. Why does H^(+) ion always get associated with atoms or molecules ...

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  5. The maximum possible number of hydrogen bonds in a water molecule can ...

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  6. NH(3) and H(2)O form NH(4)OH by

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  7. 100 mL of tap water containing Ca(HCO(3)(2) was titrated with (N)/(50)...

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  8. When zeolite, which is hydrated sodium aluminium silicate, is treated ...

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  9. The molarity of a 100 mL solution containing 5.1 g of hydrogen peroxid...

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  10. 1000 g aqueous solutioin of CaCO(3) contains 10 g of calcium carbonate...

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  11. The oxidising property of H(2)O(2) is best explained by assuming that ...

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  12. Hydrogen peroxide is used as

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  13. Decomposition of H(2)O(2) is favoured by

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  14. Match the following columns and choose the correct option.

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  15. Last molecule of H(2)O is evolved from H(2)O(2) by

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  16. The volume of 10 volume H(2)O(2) solution that decolourises 200 mL of ...

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  17. Hydrolysis of one mole of peroxodisulphuric acid produces

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  18. 100 volume hydrogen peroxide solution means

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  19. Which of the following equations depict theoxidising nature of H(2)O(2...

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  20. What is the volume of O(2) liberated at NTP by complete decomposition ...

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  21. Excess of Kl and dill. H(2)SO(4) were mixed in 50 mL H(2)O(2). Thus, ...

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